TPS54340: Is it OK to use this buck regulator to source 3A continuous output current, with Vout being 0.91V and Vin being 12V, at 125degC ambient temperature?

Hi,

1. Is it OK to use the TPS54340 buck regulator to source 3A continuous output current, with Vout being 0.91V and Vin being 12V, at 125degC ambient temperature? As per TINA simulations for the circuit exported from WEBENCH designer and power dissipation calculations assuming standard board, it does appear like this should work fine, but just wanted to reconfirm
2. Also, this design is for an HTOL test environment, and the actual design requires 10 separate test chips drawing ~3A each from their respective 0.91V supplies. I was planning to use one TPS54340 buck regulator for each test chip (to reduce power delivery network IR drops by having localized power sources), and the inputs of all 10 buck regulators would be connected to a 12V 120W DC adapter. I understand that the average current drawn from the adapter will be much lesser compared to the average current delivered to the load, but I suppose the adapter would have to support current spikes during the turn ON phases of the buck switch whose magnitude depends on the amount of decoupling capacitance available at the VIN pin of the buck? I guess it is OK to use a high value of decoupling capacitance, say 100uF near to the VIN pin to relax the dynamic current requirements for the 12V adapter?

Thanks,

Anoop